Demon slayer in nutshell x reader

This is from YouTube so it's none of my ideas. Here you are instead of Tanjiro and instead of Nezuko it's S/N witch means sister name, if you don't don't have a sister just make up a name, also the pronoun is he/him, but you can change it if you want, also this contact with spoiler from the Anime so if you haven't watch it yet, read on your on risk, that's all, hope you enjoy.